H110M-E/M2 cant downgrade from 3805

Hello guys, i have a h110m-e/M2 with 3805 bios and when i try to downgrade with EZFlash (3.0) from bios, its says "selected file is not a proper bios!"

I tried fat32, exfat and ntfs on my thumbdrive but doesnt make differ, i can upgrade It to 4204 and 4210 only

I need the bios to use my 6700K ES QH8F

Someone can give me a light?